[C++ PATCH] PR c++/58566

[Ville Voutilainen]

Tested on Linux-PPC64.

/cp
2015-10-11  Ville Voutilainen  <ville.voutilai...@gmail.com>

    PR c++/58566
    * lambda.c (lambda_return_type): Return error_mark_node
    instead of void_type_node for the error cases.

/testsuite
2015-10-11  Ville Voutilainen  <ville.voutilai...@gmail.com>

    PR c++/58566
    * g++.dg/cpp0x/lambda/lambda-58566.C: New.